I've got a set of 13mm(1/2inch) but have heard mixed things about them. I've got a 2012, Eibach pro-kit Springs, on 18x9:255/45/18 and 18x10:275/40/18. Would I run into any problems? I was looking for a wider look but didn't want too wide. Thought the 13mm would be a little more flush maybe sticking out very slightly.